/* ==========================================================================
   GA4 Analytics Reporter - Executive Stylesheet
   ========================================================================== */

:root {
  --primary: #1e3a8a;
  --primary-hover: #1e40af;
  --primary-light: #eff6ff;
  --primary-ring: rgba(30, 58, 138, 0.2);
  --success: #10b981;
  --success-light: #ecfdf5;
  --warning: #f59e0b;
  --warning-light: #fffbeb;
  --danger: #ef4444;
  --danger-light: #fef2f2;
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: #f8fafc;
  color: var(--slate-800);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* ヘッダー */
.header-nav {
  background: #ffffff;
  border-bottom: 1px solid var(--slate-200);
  position: sticky;
  top: 0;
  z-index: 40;
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--slate-900);
  font-weight: 700;
  font-size: 1.25rem;
}

.brand-icon {
  width: 2.25rem;
  height: 2.25rem;
  background: var(--primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.75rem;
  font-size: 1.2rem;
  box-shadow: 0 4px 10px rgba(30, 58, 138, 0.25);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--slate-600);
  text-decoration: none;
  transition: all 0.15s ease;
}

.nav-link:hover {
  color: var(--slate-900);
  background: var(--slate-100);
}

.nav-link.active {
  color: var(--primary);
  background: var(--primary-light);
  font-weight: 600;
}

/* メインコンテナ */
.main-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* KPIカードグリッド */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.kpi-card {
  background: #ffffff;
  border: 1px solid var(--slate-200);
  border-radius: 1rem;
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.kpi-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--slate-500);
}

.kpi-value {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--slate-900);
  margin: 0.35rem 0;
}

.kpi-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--success);
}

/* コントロールバー */
.control-panel {
  background: #ffffff;
  border: 1px solid var(--slate-200);
  border-radius: 1rem;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.control-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.select-site {
  padding: 0.65rem 2.25rem 0.65rem 1rem;
  border: 1px solid var(--slate-300);
  border-radius: 0.75rem;
  font-size: 1rem;
  font-weight: 600;
  background-color: #ffffff;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2364748b'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1rem;
}

.select-period {
  padding: 0.65rem 2rem 0.65rem 0.85rem;
  border: 1px solid var(--slate-300);
  border-radius: 0.75rem;
  font-size: 0.875rem;
  background-color: #ffffff;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2364748b'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1rem;
}

/* ボタン */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 0.75rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
  box-shadow: 0 2px 4px rgba(30, 58, 138, 0.2);
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-excel {
  background: #107c41; /* Excelグリーン */
  color: #ffffff;
  box-shadow: 0 2px 4px rgba(16, 124, 65, 0.25);
}

.btn-excel:hover {
  background: #0b5c30;
}

.btn-secondary {
  background: #ffffff;
  border-color: var(--slate-300);
  color: var(--slate-700);
}

.btn-secondary:hover {
  background: var(--slate-100);
}

.btn-danger {
  background: var(--danger-light);
  border-color: #fecaca;
  color: var(--danger);
}

.btn-danger:hover {
  background: #fee2e2;
}

/* チャートグリッド */
.charts-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

@media (max-width: 900px) {
  .charts-grid {
    grid-template-columns: 1fr;
  }
}

.chart-card {
  background: #ffffff;
  border: 1px solid var(--slate-200);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.chart-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--slate-900);
  margin-bottom: 1.25rem;
}

/* データテーブル */
.data-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: #ffffff;
  border-radius: 1rem;
  border: 1px solid var(--slate-200);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.data-table th {
  background: var(--slate-50);
  padding: 0.75rem 1rem;
  text-align: left;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--slate-500);
  border-bottom: 1px solid var(--slate-200);
}

.data-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--slate-100);
  font-size: 0.875rem;
}

.data-table tr:last-child td {
  border-bottom: none;
}

/* モーダル */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(4px);
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-content {
  background: #ffffff;
  border-radius: 1.25rem;
  width: 100%;
  max-width: 550px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  padding: 1.75rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--slate-700);
  margin-bottom: 0.35rem;
}

.form-input, .form-textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--slate-300);
  border-radius: 0.65rem;
  font-size: 0.95rem;
  box-sizing: border-box;
}

.form-input:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-ring);
}